Trapped and quasi-trapped radiation observed by CORONAS-I satellite

Fluxes of energetic electrons and MeV protons at altitudes of about 500 km were studied in the experiment onboard "CORONAS-I" satellite, launched in March 1994. We present results of analysis of different charged particle distributions: mixture of protons E-p > 30 MeV and electrons E-e > 2 MeV, electrons with E-e = 0.5-1.5 MeV and protons with E-p = 1-4.5 MeV. We found anomal high fluxes of charged particles under the Earth's radiation belts (RB) near some L < 2.5, which were not taken into account in RB models earlier. Quasi-trapped electron peaks at L approximate to 2.1, narrow electron peaks at L approximate to 1.6 and a significant electron peak at L approximate to 1.3 in the western side of Brazilian Magnetic Anomaly were observed. Besides, proton fluxes mainly near the geomagnetic equator at different longitudes were detected. Fluxes of quasi-trapped electrons with energies > 1.3 MeV at L approximate to 1.6 and L approximate to 1.3 were absent. Dependencies of anomalous electron and proton flux value on L, and local time for Northern and Southern hemispheres were investigated. (C) 1999 Elsevier Science Ltd. All rights reserved.